Question

drag each tile to the correct box.
arrange the following events in space exploration in chronological order.
humans orbited earth.
sputnik i was launched into space.
the first human stepped onto the moon.
explorer i was launched.

Explanation:

Sputnik I (1957) was the first satellite; Explorer I (1958) was the U.S.'s first satellite; Yuri Gagarin orbited Earth (1961); Neil Armstrong walked on the moon (1969). This follows the chronological order of early space exploration milestones.

Answer:

1. Sputnik I was launched into space.
2. Explorer I was launched.
3. Humans orbited Earth.
4. The first human stepped onto the moon.